As much as that is a stupid person rite there!!!! I cant think of how many time I have seen and sometimes done that exact thing myself, I weld and fabricate for a living and sometimes there is just no good place for that set of torches especially when you are building big projects. You do your best.

Thinking with thickness of tanks not an issue with that? Small leaking around gauges maybe could go? My worst problem with sparks is getting them to hit some projects I just cleaned up or even painted and it all stuck onto it. Start Over! I think if really a big issue, they would have a big slip over tank unit guard made by now, some Osha required thing, heh!!